Glass structure.



0. A M GATT. GLASS STRUCTURE. APPLICATION HLED JULY 95 1907- Patented Aug. 10, 1915.

WITNESS/5.5 [NI [INTO]? s'r rtrn' i Flt).

OTIS A. MYG-ATT, OF NEW YORK, N. Y., ASSIG-NOR T0 HOLOPHANE GLASS COMPANY, OF

NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

GLASS STRUCTURE.

Specification of Letters Patent.

Patented new. to, 1915..

Application filed July 19, 1907. Serial No. 384,554.

Glass Structures, of which the following is a specification.

The object of the present invention is to produce glassware which will appear in certain lights to be banded or'waved, although the body of the glass is not in itself banded or waved. This object is attained by providing the glassware in one modification with ribs arranged in bands, each band consisting of ribs of varying projection. The variation in projection is obtained. by varying the curvature or angle of the ribs from.

a maximum to a minimum or vice versa. Although it is not essential to my invention, I prefer that the ribs of each band he arranged synnnetrically with respect to those of the adjacent band.

In its preferred form, my invention is applied to inclosures such as shades and re llcctors. In order to produce the waved or banded appearance on such an article I cover the surface or surfaces thereoi With longitudinally extending ribs.

Although my invention is not ,limited to ribs of any particular shape, I prefer, on account of the greater convenience in deter.- mining the optical properties thereof, that these ribs be prisms.

My invention will be more clearly understood by referring to the drawing,in whichl igure l. is a diagrammatic plan view showing a shade or reflector, a portion of which is provided with ribs according to my invention; Fig. 2 is a horizontal sectional diagram showing a modification thereof; and Figs. 3 and 4 are diagrams showing further modifications of my invention.

In Fig. 1 is shown a glass structure such as a dish, reflector or the like having a series of bands of prismatic ribs C on its outside. lnithis instance the prisms are disposed in bands, the order of the prism angles in each band being 120, 100 and 90 respectively. In this ex.-

ample the 90 rib transmits the smallest i amount of light and the 140 rib the greatest amount of light. The angles of the respective prisms vary from 90 as a minimum to 140 as a maximum, and the light transmit ted varies accordingly.

In Fig. 2 are illustrated on the inner side of a cylindrical inclosure prisms C similar to those shown in Fig. 1. The outside of the cylinder may be provided with the reflecting prisms E. By means of this structure the Well-known prismatic reflector is given a banded or waved appearance.

In Fig. 3, the outer side of the structure is provided with varying sized lenticular ribs, the inside being smooth like that of Fig. 1.

Fig. 4- shows the application of the invention to an inclosure which is square in section and illustrates furthermore the application of the invention to polygonal structures in general.

It is to be understood that in each of the examples given the ribs may extend partially or wholly around the structure.

Having described my invention, what I claim and desire to secure by Letters Patent of the United States is:

A glass inclosure for artificial light having thereupon longitudinally extending bands composed of prisms each having a constant angle, the prism angles in certain bands increasing from a minimum to a maximum and then decreasing from a maximum to a inininuim.

OTIS A. MYGATT.

lVitnesses l l5. Bacon, Iionnn'r KELLY, Jr. 

